Form 2263-110506 MMP2 Installation and Operating Instructions ©2017 ZONEFIRST
®
INSTALLATION
The Mini-MasterZone
™
Plug-In Damper Zoning System-2, Model MMP2,
is a two (2) zone control panel for single stage heating only, cooling only or
heating and cooling. The MMP2 can control any single stage gas-oil-
electric furnace, hydro-air heating and air conditioning. The MMP2 panel
is the central control panel where all zone dampers, zone thermostats,
HVAC Equipment and power transformer are wired.
When installing the MMP2 panel it is important to pick a central location
where it is most convenient to bring all the wires. Most often this is near
the furnace or air handler and closest to power, the HVAC unit controls
and the zone dampers when typically located at or near the plenum.
The MMP2 case and cover are made of sturdy ABS plastic and can be
mounted to any flat surface. It is recommended that the panel be
mounted to a wall or return plenum and NOT on the furnace or plenum
where it will be in contact with the high heating temperatures. The panel
can be located in an attic space or in an enclosed cabinet of a rooftop unit,
provided the panel enclosed and not in direct exposure to the elements.
The cover easily removes from the case by pulling firmly and separating
the cover from the case exposing the circuit board. There are 4 key-hole
mounting points in each corner of the case. The case has openings in the
rear of the case as well as the side for all wiring. Wiring can come from
the back as well as the side in order to make a neat installation.
OPERATION
The MMP2 controls single stage heating and cooling HVAC Equipment.
The MMP2 is compatible with any standard single stage thermostat and
setback thermostats as well. The MMP2 has various features that make
installation and c
heckout very simple for all of the board’s functionality.
The MMP2
’s basic function is zone control. On a call for heating or
cooling, the panel will accept the first call from any zone. Upon accepting
this call the MMP2 will keep open the damper(s) to the zone calling, close
the damper(s) to those zones not calling, activate the needed HVAC
controls for heating or cooling, whichever is being called and not accept
any calls for the opposite mode.
Any calls for the opposite mode will be locked out until the initial mode is
either satisfied or a period of time has elapsed that is sufficient for the
first mode to satisfy, a maximum of 20 minutes. A Patent Pending
sequence determines the time the unit has been running or needs to
continue to run in order to adequately provide conditioning for each
mode. If a particular mode has already been calling for 20 minutes or
longer and an opposite call comes in the MMP2 will immediately drop the
mode, enter the purge mode in order to dissipate the conditioned air into
the zones calling before switching over to provide the new conditioning
call to its zones.
PURGE TIME
Once a call is satisfied the MMP2 drops the call for the heating or cooling
unit controls, whichever was calling and hold the damper(s) to the zone(s)
that were last calling during the Purge Mode. The Purge mode is
nominally 2 minutes and allows the excess conditioned air in the plenum
to be distributed only to the zone(s) that were last calling. This eliminates
the problem of overshooting the temperature in the satisfied zones.
Once all zone thermostats are satisfied for heating and cooling, the MMP3
can now accept Fan calls allowing Continuous Air Circulation (CAC) in
those zones where the thermostat’s Fan Switch is set to
ON. These zone dampers will be OPEN while the dampers to the zones
where the Fan Switch is set to AUTO will be CLOSED.
When all zone thermostats are satisfied for both Heating and Cooling, and
all Fan switches are set to AUTO position, the HVAC unit will be off and all
zone dampers will return to a normally open position. Once a zone calls
for heating, cooling or fan, the dampers to the calling zones remain open
and the dampers to the zones not calling will close.
HVAC Equipment Set-Up
The MMP2 is factory set for conventional fossil fuel (oil or gas) single stage
heating and cooling.
Jumpers on the panel are for NO SENSOR and TEST. The NO SENSOR
jumper must be placed on both pins when the sensor (ZPS) is not used.
The TEST jumper (when placed on both pins) accelerates the panel timings
in order to provide a quick checkout of the panel functions. During typical
operating conditions this jumper
should not
be on both pins
CHANGEOVER TIMER
Whenever a call is made for either heating or cooling, the changeover
timer is activated in order to track the amount of time heating or cooling
is on. When an opposite call is made after a first call is existing the
changeover timer calculates the amount of time the unit has already been
supplying the first mode in order to determine how long it will hold off the
opposite call. If an opposite call is made shortly after the first call, the
opposite call may be held off for as much as 20 minutes. If the first call or
subsequent calls for the first call mode has had that mode operating for
up to 20 minutes already and an opposite call comes in after 20 minutes,
the changeover timer will immediately recognize the opposite call,
shutting off the current mode, enter the purge mode and automatically
switch to the opposite mode.
The longer a call has been running up to 20 minutes, the shorter the wait
time will be for an opposite call. If a call is over 20 minutes and an
opposite call is made the changeover will be immediate following the
purge time. This intelligent changeover timing makes the MMP2 unique
to any other zoning system.
CHECKOUT
The MMP2 has unique features that simplify the checkout of the system
and has LED readouts that constantly indicate the system operation. Once
24 Volt Power is applied to the panel the Green Power LED will illuminate.
This will stay illuminated constantly when power is applied.
The System LED will provide several different indications based upon color
and if it is flashing.
Heat ON - RED
Heat Over Limit - RED Flashing
Cool ON - GREEN
Cool Over Limit - Green Flashing
Fan ON - AMBER
Purge - AMBER Flashing
Each zone has its own small Green indicator LED next to each zone relay.
This light is lit whenever the zone damper is to be open, either on a call or
when all zones are satisfied.
